Add --skip-sse42-requirements to install.sh and enable SKIP_SSE42_REQUIREMENTS override (#1790)

Not all environments are KVM, and not all virtualized CPUs show SSE4.2 support even if they do support it. This adds an escape hatch if you know what you are doing.

Author: owaindjones

install/check-minimum-requirements.sh

@@ -50,8 +50,9 @@ fi
 
 #SSE4.2 required by Clickhouse (https://clickhouse.yandex/docs/en/operations/requirements/)
 # On KVM, cpuinfo could falsely not report SSE 4.2 support, so skip the check. https://github.com/ClickHouse/ClickHouse/issues/20#issuecomment-226849297
+# This may also happen on other virtualization software such as on VMWare ESXi hosts.
 IS_KVM=$(docker run --rm busybox grep -c 'Common KVM processor' /proc/cpuinfo || :)
-if [[ "$IS_KVM" -eq 0 && "$DOCKER_ARCH" = "x86_64" ]]; then
+if [[ ! "$SKIP_SSE42_REQUIREMENTS" -eq 1 && "$IS_KVM" -eq 0 && "$DOCKER_ARCH" = "x86_64" ]]; then
   SUPPORTS_SSE42=$(docker run --rm busybox grep -c sse4_2 /proc/cpuinfo || :)
   if [[ "$SUPPORTS_SSE42" -eq 0 ]]; then
     echo "FAIL: The CPU your machine is running on does not support the SSE 4.2 instruction set, which is required for one of the services Sentry uses (Clickhouse). See https://github.com/getsentry/self-hosted/issues/340 for more info."

install/parse-cli.sh

@@ -17,7 +17,11 @@ Options:
  --skip-commit-check    Skip the check for the latest commit when on the master
                           branch of a \`self-hosted\` Git working copy.
  --skip-user-creation   Skip the initial user creation prompt (ideal for non-
-                          interactive installs).
+                          	interactive installs).
+ --skip-sse42-requirements
+			Skip checking that your environment meets the
+			  requirements to run Sentry. Only do this if you know
+			  what you are doing.
  --report-self-hosted-issues
                         Report error and performance data about your self-hosted
                           instance upstream to Sentry. See sentry.io/privacy for
@@ -41,6 +45,7 @@ SKIP_USER_CREATION="${SKIP_USER_CREATION:-}"
 MINIMIZE_DOWNTIME="${MINIMIZE_DOWNTIME:-}"
 SKIP_COMMIT_CHECK="${SKIP_COMMIT_CHECK:-}"
 REPORT_SELF_HOSTED_ISSUES="${REPORT_SELF_HOSTED_ISSUES:-}"
+SKIP_SSE42_REQUIREMENTS="${SKIP_SSE42_REQUIREMENTS:-}"
 
 while (($#)); do
   case "$1" in
@@ -61,6 +66,7 @@ while (($#)); do
   --skip-commit-check) SKIP_COMMIT_CHECK=1 ;;
   --report-self-hosted-issues) REPORT_SELF_HOSTED_ISSUES=1 ;;
   --no-report-self-hosted-issues) REPORT_SELF_HOSTED_ISSUES=0 ;;
+  --skip-sse42-requirements) SKIP_SSE42_REQUIREMENTS=1 ;;
   --) ;;
   *)
     echo "Unexpected argument: $1. Use --help for usage information."